cregit-Linux how code gets into the kernel

Release 4.10 tools/perf/arch/powerpc/annotate/instructions.c


static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name) { int i; struct ins_ops *ops; /* * - Interested only if instruction starts with 'b'. * - Few start with 'b', but aren't branch instructions. */ if (name[0] != 'b' || !strncmp(name, "bcd", 3) || !strncmp(name, "brinc", 5) || !strncmp(name, "bper", 4)) return NULL; ops = &jump_ops; i = strlen(name) - 1; if (i < 0) return NULL; /* ignore optional hints at the end of the instructions */ if (name[i] == '+' || name[i] == '-') i--; if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) { /* * if the instruction ends up with 'l' or 'la', then * those are considered 'calls' since they update LR. * ... except for 'bnl' which is branch if not less than * and the absolute form of the same. */ if (strcmp(name, "bnl") && strcmp(name, "bnl+") && strcmp(name, "bnl-") && strcmp(name, "bnla") && strcmp(name, "bnla+") && strcmp(name, "bnla-")) ops = &call_ops; } if (name[i] == 'r' && name[i-1] == 'l') /* * instructions ending with 'lr' are considered to be * return instructions */ ops = &ret_ops; arch__associate_ins_ops(arch, name, ops); return ops; }

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ravi bangoriaravi bangoria227100.00%1100.00%
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static int powerpc__annotate_init(struct arch *arch) { if (!arch->initialized) { arch->initialized = true; arch->associate_instruction_ops = powerpc__associate_instruction_ops; arch->objdump.comment_char = '#'; } return 0; }

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ravi bangoriaravi bangoria43100.00%1100.00%
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ravi bangoriaravi bangoria270100.00%1100.00%
Total270100.00%1100.00%
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